Improvement in buffing-mandrels



a. B." nuNHAM.

Buffng Mandreis.

No. 137,187. Paten'tedmarchzius.

ld/mma, 'Wl ous'son/ yh i7 UNITED STATESA ,Prsrnlvfr OFFICE A GEORGE B. DNHAM, OF LYNN, MASSACHUSETTS, ASSIGNOR TO JOHN G.

- BUZZELL St OO., OF SAME PLACE.

IMPROVEMENT IN BUFFlNG-MANDRELS.

Specification forming part of Letters Patent No. 137,187, dated March 25, 1873.

To all 'whom it may concern:

Be it known that I, GEO. B. DUNHAM, of Lynn, in the county of Essex and in the State of Massachusetts, have invented certain new and useful Improvements in Buffer-Rolls 5 and do hereby declare that the following is a full, clear, and eXact description thereof, reference being had to the accompanying drawing making a part of this specification, in which- Figure 1 is a perspective view of my improved device as ready for use. Fig. 2 is a like view of the same with the roller sections disengaged and opened out. Fig. 3 is a central longitudinal section of said device, and Fig. 4 is a central cross-section of the same.

Letters of like name and kind refer to like parts in each of the figures.v

The object of my invention is to enable the abrasive covering to be easily and quickly placed upon or removed from the roller 5 and it consists principally in a buier-roller divided centrally and longitudinally, and its sections connected with each other and with the shaft, substantially as and for the purpose hereinafter specified. It consists, further, in the means employed for attaching the felt to or upon the periphery of the roller, substantially as and for the purpose hereinafter set forth. It consists, nally, in the device as a whole, when its parts are constructed and combined substantially as and for the purpose hereinafter specified.

In the annexed drawing, A represents a shaft, having upon and around its periphery a wooden roller, B, which is constructed in two sections that unite upon a central longitudinal line. One of the sections is permanently attached to the roller, while said sections are connected together by means of a strip of suitable elastic material, C, that extends along their entire length at one side and forms a flexible hinge for, and upon which the movable section swings. Attached to the divided edge of each section, opposite to the hinge C, is a strip of sheet metal, D, which extends radially outward to a short distance beyond the periphery of the roller, and is provided along its outer edge with a series of perfor-ations, d. Encircling the roller B, and extending between the metal flanges D, is a covering of felt or other suitable elastic material, E, the edges of which are connected with said iianges by means of a thread which is passed through said felt and through the openings d, as shown. The ends of the roller B are made conical, and over or against each, and over a threaded portion, c, of the shaft A, is fitted a nut, F, the inner face of which is concave and corresponds to the shape of saidmroller end. As thus constructed, it will be seen that by screwing inward upon the nuts their conical faces will opand lit into corresponding openings formed in the edge of the opposite section.

When it is desired to replace the covering the nuts are turned outward so as to release the movable roller section, the latter opened away from the shaft, and the edges of said covering removed, after which a new covering can be applied and the parts replaced, the en tire operation requiring but afew moments of time.

The advantages afforded by this construeA tion are the security with which the elastic and abrasive coverings are held in position upon the roller, and the ease with which they can be placed upon or removed from the same.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1s= l. In combination with the shaft A, the buf= fer-roller B divided .longitudinally and centrally, and its sections connected together at one side by means of the elastic hinge C, sub stantially as and for the purpose specified.

2. In combination with the divided rollerB and felt covering E, the metal anges l) attached to said roller, and provided with the perforations d, substantially as and for the purpose set forth.

3. In combination with the divided rollerB provided with conical ends7 the nuts F made concave upon their inner faces and fitted upon the threaded portions a, of the shaft A, substantially as and for the purpose shown.

4. The shaft A provided with the threaded portions c, the divided roller B having` con ical ends and covered With felt E and abrasive material G, and the nuts F having conical inner fares, when said parts are constructed and combined substantially as and for the purpose specified. Y In testimony that I claim the foregoing I Witnesses:

WM. H. NILns, LOUIS E. MOORE. 

